$ git clone -n https://src.fedoraproject.org/rpms/python-represent.git /var/lib/mock/f40-build-2318237-58235/root/chroot_tmpdir/scmroot/python-represent
Cloning into '/var/lib/mock/f40-build-2318237-58235/root/chroot_tmpdir/scmroot/python-represent'...
$ git fetch origin bbbaa5345161e80b2b0afa04e4c95fdd0f197e23:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-represent
 * [new ref]         bbbaa5345161e80b2b0afa04e4c95fdd0f197e23 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bbbaa53 Update to 2.1.0 (rhbz#2259908)